package com.neuedu.filter;


import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;


@WebFilter("/*")
public class CornFilter implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {

    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request= (HttpServletRequest) servletRequest;
        HttpServletResponse response= (HttpServletResponse) servletResponse;
        response.setHeader("Access-Control-Allow-Origin","*");
        response.setHeader("Access-Control-Allow-Credentials","true");
        response.setHeader("Access-Control-Allow-Methods","GET, POST, PUT, DELETE, OPTIONS");
        response.setHeader("Access-Control-Max-Age","3600");
        response.setHeader("Access-Control-Allow-Headers","Origin, X-Requested-With, Content-Type, Accept");
        response.setHeader("Access-Control-Expose-Headers","Location");
        filterChain.doFilter(request,response);
    }

    @Override
    public void destroy() {

    }
}
